About the common and uncommon: Mostly women are omegas and males are alphas, felix is a male omega so its uncommon, betas are the most common second gender amongst the population.
(I will probably add more characters) (sorry if i change povs and forget to announce it, please comment and i will fix it)
Authors note: This is my first time actually writing a fanfiction, sorry if its cringe. English is not my first language so please let me know if i make any mistakes. Im gonna try to update every week and i hope you enjoy this story.